QBI Neuroscience Seminar: Reverse Replay during Human Problem Solving

Event Details

Date:

Friday, 09 December 2016

Time:

12:00 pm - 1:00 pm

Room:

QBI Level 7 Auditorium

UQ Location:

Queensland Brain Institute (St Lucia)

URL:

http://www.qbi.uq.edu.au/neuroscience-seminars

Event category(s):

Full Description:: Professor Peter Dayan, Director, Gatsby Computational Neuroscience Unit,
University College London, UK

Title: Reverse Replay during Human Problem Solving

Abstract: The fast replay of sequences of neural representations has been suggested as supporting learning and online planning. However, it has largely been studied in spatial tasks in rodents. I will show how we came upon reverse replay during our latest attempt to use the decoding of MEG data to capture the process of human model-based planning in a non-spatial sequential decision-making problem (Kurth-Nelson et al, Neuron, 2016). During epochs in which our subjects were planning, their brains spontaneously visited representations of approximately four states in the problem in fast sequences lasting on the order of 120 milliseconds. These sequences followed backward trajectories along the permissible paths in the task.